/*
 * Copyright (C) 2013 Peng fei Pan <sky@panpf.me>
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package me.panpf.sketch.request;

import android.support.annotation.NonNull;

/**
 * 请求监听器，可监听开始、失败、取消
 */
public interface Listener {
    void onStarted();

    /**
     * 失败
     *
     * @param cause 原因
     */
    void onError(@NonNull ErrorCause cause);

    /**
     * 取消
     *
     * @param cause 原因
     */
    void onCanceled(@NonNull CancelCause cause);
}
